NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1821060369 M.D.
Verify on CMS → William Allen, M.D.
Emergency Medicine Physician in Middletown, Connecticut.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 64,398 in Emergency Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
308
Medicare Part D claims · 187 beneficiaries · Emergency Medicine Physician avg: 352
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
William Allen, M.D. filed 308 Medicare Part D claims in 2023 as a Emergency Medicine Physician in Middletown, Connecticut, prescribing 94% generic.
- 308
- Part D claims, 2023
- 94%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
William Allen, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
308 Top 43% higher than 57% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
William Allen, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about William Allen, M.D.?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
308 12% vs specialty avg
Specialty distribution in Connecticut
How Emergency Medicine Physician compares to other specialties among Connecticut providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Emergency Medicine Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
William Allen, M.D. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding M.D. credentials at 28 CRESCENT ST, Middletown, CT, 06457, with a listed phone of (860) 344-6394. NPI 1821060369 was issued on 02/07/2006.
Medicare Part D records for calendar year 2023 show 308 prescription claims written by this provider, covering 187 Medicare beneficiaries and totaling roughly $4K in drug spend, split 6% brand-name and 94% generic by claim count, with an opioid prescribing rate of 14.0%.
Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1821060369 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/07/2006 |
Hospital and facility affiliations
Facilities where William Allen, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Travis County Emergency Physicians PA
Houston, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
William Allen, M.D. - brand share 6.0%
Emergency Medicine Physician average
6% brand-name claims vs 94% generic, on 308 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
308
Total Claims
$4K
Total Drug Cost
187
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 308
- Total Day Supply
- 2,991
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $941
- Generic Drug Cost
- $3K
- Opioid Claims
- 43 (14.0% rate)
- Antibiotic Claims
- 94
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.49
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 18, 65-74: 74, 75-84: 76, 85+: 19
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What William Allen, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tramadol Hcl
Tramadol Hcl
32 claims
- Methocarbamol
Methocarbamol
24 claims
- Ondansetron Odt
Ondansetron Odt
21 claims
- Nitrofurantoin Mon…
Nitrofurantoin Mono-Macro
18 claims
- Cefpodoxime Proxetil
Cefpodoxime Proxetil
17 claims
- Methylprednisolone
Methylprednisolone
15 claims
- Amoxicillin-Clavul… 12
Amoxicillin-Clavulanate Potass
12 claims
- Albuterol Sulfate … 11
Albuterol Sulfate Hfa
11 claims
| Drug | Claims |
|---|---|
| Tramadol Hcl | 32 |
| Methocarbamol | 24 |
| Ondansetron Odt Ondansetron | 21 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 18 |
| Cefpodoxime Proxetil | 17 |
| Methylprednisolone | 15 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 12 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 11 |
| Azithromycin | 11 |
| Ciprofloxacin Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How William Allen, M.D. fits within the Emergency Medicine Physician landscape nationally.
64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider
William Allen, M.D.'s 308 claims are below the specialty average of 352.
Nearby Emergency Medicine Physician Providers in Connecticut
Other clinicians with the same primary specialty enrolled in Connecticut, drawn from the same CMS NPPES roster as Allen.
Dr. Carol Abbatiello
D.O.
Hartford, CT
Dr. Lincoln Abbott
MD
Hartford, CT
Dr. Clayton Abeln
MD
New Haven, CT
Dr. Wayne Abrahams
MD
Waterbury, CT
Dr. Theresa Adams
M.D.
New London, CT
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Connecticut medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Emergency Medicine Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is William Allen, M.D.'s specialty? ▼
William Allen, M.D. specializes in Emergency Medicine Physician and practices in Middletown, Connecticut. Credentials: M.D..
How much does William Allen, M.D. prescribe under Medicare Part D? ▼
In 2023, William Allen, M.D. wrote 308 Medicare Part D claims totaling $4K in drug costs for 187 beneficiaries.
Where is William Allen, M.D. located? ▼
William Allen, M.D. is located at 28 CRESCENT ST, Middletown, CT, 06457. Phone: (860) 344-6394.
What is William Allen, M.D.'s NPI number? ▼
William Allen, M.D.'s National Provider Identifier (NPI) is 1821060369, issued on 02/07/2006.
Does William Allen, M.D. prescribe more brand-name or generic drugs? ▼
William Allen, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $941 in brand drug costs.
Does William Allen, M.D. prescribe opioids? ▼
Yes, William Allen, M.D. had 43 opioid claims in 2023 with an opioid prescribing rate of 14.0%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does William Allen, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, William Allen, M.D.'s most frequently prescribed drugs include Tramadol Hcl, Methocarbamol, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Allen, M.D. accept Medicare? ▼
William Allen, M.D. appears in CMS Medicare data with 308 Part D claims and 187 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Allen, M.D.'s credentials? ▼
William Allen, M.D.'s NPI is 1821060369 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.